I _____ to help you but I was not able to spare any time. I _____a paper last night and I’ll have to finish it today.
The boss appeared ______ the accident and was not surprised at the news.
________ a vocation, and you’ll forget unhappy things
---Why do you look so upset? ---There are so many troublesome problems _____.
The cancer risks ___________ smoking have been well documented.
They are purely __________ weapons, not designed for attacks.